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| author | Kane Chen <kane.chen@intel.com> | 2020-04-13 20:48:54 +0800 |
|---|---|---|
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2020-04-28 15:43:36 +0000 |
| commit | d2b2be39296d910178173273017800a1b054a1ba (patch) | |
| tree | 093bc25858c3ae8eb5bfb9ab06e361c0eae5d097 /Documentation/acpi | |
| parent | 007faee9486bcc24e1bc7011717ae88d7eb5e62b (diff) | |
soc/intel/cannonlake: Report driver strength by _DSM in eMMC ACPI device
According to doc 621880, it suggests setting 40 ohm in byte 185 in extCSD.
This commit provides _DSM method for driver to query driving strength.
TEST=mmc extcsd read |grep HS_TIMING and found bit[7:4] is set to 4
BUG=b:154159888
Signed-off-by: Kane Chen <kane.chen@intel.com>
Change-Id: I1b4df8b0d1d2cad3a7f521ad47ee5a4b3320c767
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40467
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'Documentation/acpi')
0 files changed, 0 insertions, 0 deletions